Are goldfish afraid of the dark?

All fish should have an established day and night cycle. Fish do not have eyelids and rely on total darkness to rest. Without at least 8 hours of darkness, your goldfish can become sleep-deprived. This means you should turn off all lights before you go to bed to ensure your goldfish can rest peacefully.
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Are goldfish OK in the dark?

If your tank is in a poorly lit area – or if you want to grow live plants, such as hornwort – then it would be a good idea to include a light in your aquarium. Remember to switch off your aquarium light at night, as this will replicate natural day/night cycles. Like humans, goldfish prefer to sleep in the dark.
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Can goldfish be scared of the dark?

Goldfish aquariums do need light. But just as importantly, they also need dark. Goldfish, like all living things, live according to daily cycles. In the wild, they eat at certain times during the day and sleep when it's dark.
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Should I turn my goldfish light off at night?

Aquarium fish do not need light and it is best that you turn it off during the night. Leaving the light on can cause stress to fish as they need a period of darkness to sleep. Too much light will cause algae to rapidly grow and make your tank look dirty. So the short answer is no, do not leave your lights on.
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Can goldfish sleep with light on?

Goldfish get tired just like humans do and enjoy a good night's rest. Goldfish can only sleep when the surrounding area is dark, and no lights are on over the tank or throughout the environment. This makes it important to ensure that you give your goldfish a period of darkness for several hours a day.
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How can I tell if my goldfish is happy?

Your fish are happy and healthy when they:
  1. Swim actively throughout the entire tank, not just hanging out or laying at the bottom, floating near the top or hiding behind plants and ornaments.
  2. Eat regularly and swim to the surface quickly at feeding time.
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Can goldfish hear you?

Interestingly, they can listen to you. Just not in the way you think. You may have found goldfish responding to you tapping on the glass to get their attention. They can hear using several different sensory organs, mainly their internal ears and lateral line.
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Do fish like the dark?

Fish don't like the dark because when there is no light to see, they dart around the tank, colliding with the walls, ornaments and can even become tangled in the plants. Fish need light to determine whether it is night or day, and they're scared of the sudden switch from darkness to light.
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What happens if you leave a goldfish in the dark?

If you keep your fish in the dark all the time, the chromatophores won't produce more pigment, so the fish's color will start to fade as the chromatophores that already have color naturally die, while the new cells aren't stimulated to produce pigment.
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Do fish like blue light at night?

No, you should not keep a blue light or any other colored light on in your fish tank through the night. Unless you have nocturnal fish, they depend on light cycles to maintain their sleep cycle. Leaving a light on at night will disturb this cycle and result in sleep-deprived and stressed fish.
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Do goldfish need lights?

Goldfish do not rely on lighting as plants do, but it is still important to give them a day and night cycle. This will help their eye development and provide them with the light requirements that they would receive in the wild.
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Do fish like lights in their tank?

Unlike plants, fish do not have a biological need for light, so they require less. Natural sunlight at noon has a rating of 5500 Kelvin. How long should I keep my aquarium lights on? To provide animals and plants the lighting they need, 10 to 12 hours a day is sufficient.
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Do goldfish like to hide?

To protect themselves, fish will instinctively hide when they are uncertain, frightened, stressed or uncomfortable. Having a safe place to retreat provides comfort and security, and greatly improves a fish's chance of surviving in the wild.
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How can you tell if your goldfish is unhappy?

Strange Swimming: When fish are stressed, they often develop odd swimming patterns. If your fish is swimming frantically without going anywhere, crashing at the bottom of his tank, rubbing himself on gravel or rocks, or locking his fins at his side, he may be experiencing significant stress.
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Do goldfish recognize their owners?

Pet goldfish can distinguish between humans, and often recognise the human that regularly feeds them. Pet goldfish can also seem quite scared of new people, but become more comfortable with their owners over time as they realise they aren't a threat.
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Do goldfish get lonely?

However, we can say that it is very unlikely that goldfish get lonely. What is this? Goldfish are just not the same as humans – they're not social animals in the same way that we are, and they don't have the same capacity to get bored or long for companionship.
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Can a fish tank be in a dark room?

It's best to not keep your aquarium fish in the dark all the time. They need cycles of light to determine whether it's day and night. This also means that you can't keep your aquarium fish in the light all day.
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Why did my goldfish turn white?

Did you know that goldfish have pigment in their skin? This pigment can react to UV light in some fish. So, your goldfish could turn white due to both a lack of sunlight or too much sunlight. In the case of too much light, fish usually respond to the dramatic change.
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How long does a goldfish live?

Goldfish have a lifespan averaging about 10-15 years, with some varieties living up to 30 years when provided with proper care. Unfortunately, many goldfish do not reach their lifespan potential due to inadequate housing conditions. Housing needs to meet both their behavioural and physiological needs.
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Do fish get stressed in the dark?

Aquarium fish are indifferent to lighting... How bright or how dark the light is isn't important to them. Thats not true at all honestly- a complete generalization... Fish absolutely care about how bright a tank is and many will stress if the tank is too bright- especially if there aren't any hiding places.
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Do fish need full dark night?

Fish don't necessarily need complete darkness to sleep, but it's best to provide them with the amount of darkness they would have in their natural environment. They may sleep when tired if the lights are on, but it will be better for their sleep and overall health if they can rest in darkness.
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What does fish do at night?

While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.
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Do goldfish like noise?

Tapping on the side of the tank – or making a loud noise near your goldfish tank – will cause strong vibrations and startle your fish. Being startled can be very stressful for your fish so you should never tap on the side of your tank. You should also avoid making too much noise near your aquarium.
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Do goldfish like music?

A pair of goldfish survived 134 days without food after the February 2011 earthquake in Christchurch, New Zealand. A new study finds that not only do goldfish listen to music, but the famously forgetful fish can also distinguish between Bach and Stravinsky.
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